TY - JOUR KW - Adolescent KW - illicit drug KW - Social Media KW - YOUTH AD - Department of Family and Community Health, University of Pennsylvania School of Nursing, Philadelphia, PA, United States.; University of Pennsylvania School of Nursing, Philadelphia, PA, United States.; Wharton Risk Management and Decision Processes Center, Philadelphia, PA, United States.; Department of Computer and Information Science, Philadelphia, PA, United States.; Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States.; Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States.; Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States.; Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States. BT - JMIR public health and surveillance C5 - Healthcare Disparities; Opioids & Substance Use CP - 1 DO - 10.2196/16191 IS - 1 JF - JMIR public health and surveillance LA - eng M1 - Journal Article PY - 2020 SN - 2369-2960; 2369-2960 T1 - Exploring Substance Use Tweets of Youth in the United States: Mixed Methods Study T2 - JMIR public health and surveillance TI - Exploring Substance Use Tweets of Youth in the United States: Mixed Methods Study U1 - Healthcare Disparities; Opioids & Substance Use U2 - 32213472 U3 - 10.2196/16191 VL - 6 VO - 2369-2960; 2369-2960 Y1 - 2020 Y2 - Mar 26 ER -